TLS 1.0 and 1.1 are deprecated for use with Azure Cache for Redis

After March 31, 2020, Microsoft Azure will only support TLS1.2 for Azure Redis Cache and will stop supporting TLS1.0 and TLS1.1. Sitecore XP 8.x on .NET 4.6.1 and lower will not be able to connect and work with Redis Cache using TLS 1.0 or TLS 1.1.